<template>
  <div :id="id" :class="className" :style="{ height: height, width: width }" />
</template>

<script>
import tdTheme from './theme.json' // 引入默认主题
import '../map/fujian.js'
import { clickNode, clickLine } from '@/api/echart'
import Bus from '@/common/bus'

export default {
  name: 'Echart',
  props: {
    className: {
      type: String,
      default: 'chart'
    },
    id: {
      type: String,
      default: 'chart'
    },
    width: {
      type: String,
      default: '100%'
    },
    height: {
      type: String,
      default: '2.5rem'
    },
    options: {
      type: Object,
      default: () => ({})
    }
  },
  data() {
    return {
      chart: null
    }
  },
  watch: {
    options: {
      handler(options) {
        // 设置true清空echart缓存
        this.chart.setOption(options, true)
      },
      deep: true
    }
  },
  mounted() {
    this.$echarts.registerTheme('tdTheme', tdTheme) // 覆盖默认主题
    this.initChart()
    clickNode(0).then(res => {
      Bus.$emit('nodeInfo', res.data)
    })
  },
  beforeDestroy() {
    this.chart.dispose()
    this.chart = null
  },
  methods: {
    initChart() {
      // 初始化echart
      this.chart = this.$echarts.init(this.$el, 'tdTheme')
      this.chart.setOption(this.options, true)
      const _this = this
      this.chart.on('click', function (params) {
        if (params.componentSubType == 'effectScatter') {
          const nodeData = params.data.nodeData
          clickNode(nodeData.i).then(res => {
            Bus.$emit('nodeInfo', res.data)
          })
        } else if (params.componentSubType == 'lines') {
          const lineData = params.data.lineData
          const data = _this.getDerection(
            lineData.derection,
            lineData.i,
            lineData.j
          )
          clickLine(data[0], data[1]).then(res => {
            Bus.$emit('lineInfo', res.data)
          })
        }
      })
    },
    getDerection(derection, i, j) {
      return derection == 1 ? [i, j] : derection == 2 ? [j, i] : [0, 0]
    }
  }
}
</script>

<style>
</style>
